Get createType to return types without using as

[forgetso]

    private unwrapContractResultOrThrow<T>(result: ContractExecResultOk, type: DefinitionKeys): T {
        const decoded = this.contract.api.registry.createType(`Result<${type}, ProsopoError>`, result.data.toU8a(true))
        if (decoded.isOk) {
            return decoded.asOk.toPrimitive() as T
        } else {
            throw new ProsopoContractError(decoded.asErr.toString())
        }
    }